package com.smart.community.region.service.impl;

import java.time.LocalDate;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cache.annotation.Cacheable;
import org.springframework.stereotype.Service;

import com.smart.community.region.service.IBuildingService;
import com.smart.community.region.service.IHouseholdAggregationService;
import com.smart.community.region.service.IHouseholdService;

import lombok.extern.slf4j.Slf4j;

/**
 * 住户聚合统计服务实现类
 *
 * @author Wu.Liang
 * @since 2025-01-21
 */
@Slf4j
@Service
public class HouseholdAggregationServiceImpl implements IHouseholdAggregationService {

    @Autowired
    private IHouseholdService householdService;

    @Autowired
    private IBuildingService buildingService;
    // ==================== Controller调用的方法 ====================

    /**
     * 获取住户基础统计信息
     */
    @Cacheable(value = "household:basicStats", key = "#communityIds.hashCode()", unless = "#result == null || #result.isEmpty()")
    public Map<String, Object> getBasicStats(List<Long> communityIds) {
        long startTime = System.currentTimeMillis();
        log.info("获取住户基础统计信息，社区ID：{}", communityIds);
        
        try {
            // 参数验证
            if (communityIds == null || communityIds.isEmpty()) {
                log.warn("社区ID列表为空，返回空统计信息");
                return new HashMap<>();
            }
            
            Map<String, Object> stats = new HashMap<>();
            
            // 基础统计
            long totalHouseholds = 0L;
            long occupiedHouseholds = 0L;
            long vacantHouseholds = 0L;
            double occupancyRate = 0.0;
            
            // 按社区统计
            Map<Long, Object> communityStats = new HashMap<>();
            Map<Long, Long> communityDistribution = new HashMap<>();
            
            for (Long communityId : communityIds) {
                try {
                    // 统计该社区的住户数量
                    Long householdCount = householdService.countHouseholds(communityId);
                    if (householdCount == null) {
                        householdCount = 0L;
                    }
                    totalHouseholds += householdCount;
                    
                    // 模拟已入住和空闲户数（实际应该查询数据库）
                    long occupied = (long) (householdCount * 0.8); // 80%入住率
                    long vacant = householdCount - occupied;
                    occupiedHouseholds += occupied;
                    vacantHouseholds += vacant;
                    
                    // 社区统计数据
                    Map<String, Object> communityData = new HashMap<>();
                    communityData.put("totalHouseholds", householdCount);
                    communityData.put("occupiedHouseholds", occupied);
                    communityData.put("vacantHouseholds", vacant);
                    communityData.put("occupancyRate", householdCount > 0 ? (double) occupied / householdCount * 100 : 0.0);
                    
                    communityStats.put(communityId, communityData);
                    communityDistribution.put(communityId, householdCount);
                } catch (Exception e) {
                    log.error("统计社区{}住户信息失败", communityId, e);
                    // 继续处理其他社区，不中断整个统计过程
                }
            }
            
            // 计算总体入住率
            occupancyRate = totalHouseholds > 0 ? (double) occupiedHouseholds / totalHouseholds * 100 : 0.0;
            
            // 构建返回数据
            stats.put("totalHouseholds", totalHouseholds);
            stats.put("occupiedHouseholds", occupiedHouseholds);
            stats.put("vacantHouseholds", vacantHouseholds);
            stats.put("occupancyRate", occupancyRate);
            stats.put("communityStats", communityStats);
            stats.put("communityDistribution", communityDistribution);
            
            long endTime = System.currentTimeMillis();
            log.info("获取住户基础统计信息完成，社区数量：{}，总住户：{}，耗时：{}ms", communityIds.size(), totalHouseholds, endTime - startTime);
            return stats;
            
        } catch (Exception e) {
            long endTime = System.currentTimeMillis();
            log.error("获取住户基础统计信息失败，耗时：{}ms", endTime - startTime, e);
            return new HashMap<>(); // 生产环境优雅降级
        }
    }

    /**
     * 获取住户详细统计信息
     */
    public Map<String, Object> getDetailedStats(List<Long> communityIds) {
        log.info("获取住户详细统计信息，社区ID：{}", communityIds);
        
        try {
            Map<String, Object> stats = new HashMap<>();
            
            // 获取基础统计
            Map<String, Object> basicStats = getBasicStats(communityIds);
            stats.putAll(basicStats);
            
            // 详细统计
            Map<String, Long> householdTypeDistribution = new HashMap<>();
            Map<String, Long> householdStatusDistribution = new HashMap<>();
            Map<String, Long> areaDistribution = new HashMap<>();
            Map<String, Object> buildingStats = new HashMap<>();
            Map<String, Object> unitStats = new HashMap<>();
            
            // 住户类型分布
            householdTypeDistribution.put("住宅", 0L);
            householdTypeDistribution.put("商铺", 0L);
            householdTypeDistribution.put("办公", 0L);
            householdTypeDistribution.put("其他", 0L);
            
            // 住户状态分布
            householdStatusDistribution.put("空闲", 0L);
            householdStatusDistribution.put("已售", 0L);
            householdStatusDistribution.put("已租", 0L);
            householdStatusDistribution.put("装修中", 0L);
            householdStatusDistribution.put("自住", 0L);
            
            // 面积分布
            areaDistribution.put("小户型(<60㎡)", 0L);
            areaDistribution.put("中户型(60-120㎡)", 0L);
            areaDistribution.put("大户型(120-200㎡)", 0L);
            areaDistribution.put("超大户型(>200㎡)", 0L);
            
            // 楼栋统计
            buildingStats.put("totalBuildings", 0L);
            buildingStats.put("averageFloors", 0.0);
            buildingStats.put("totalUnits", 0L);
            
            // 单元统计
            unitStats.put("totalUnits", 0L);
            unitStats.put("averageHouseholdsPerUnit", 0.0);
            
            // 这里应该根据实际业务逻辑查询详细数据
            // 暂时返回模拟数据
            for (Long communityId : communityIds) {
                // 统计楼栋数量
                Long buildingCount = buildingService.countBuildings(communityId);
                if (buildingCount != null) {
                    long currentBuildingCount = (Long) buildingStats.get("totalBuildings");
                    buildingStats.put("totalBuildings", currentBuildingCount + buildingCount);
                }
            }
            
            // 添加到返回数据
            stats.put("householdTypeDistribution", householdTypeDistribution);
            stats.put("householdStatusDistribution", householdStatusDistribution);
            stats.put("areaDistribution", areaDistribution);
            stats.put("buildingStats", buildingStats);
            stats.put("unitStats", unitStats);
            
            return stats;
            
        } catch (Exception e) {
            log.error("获取住户详细统计信息失败", e);
            throw new RuntimeException("获取住户详细统计信息失败：" + e.getMessage());
        }
    }

    /**
     * 获取住户分布统计
     */
    public Map<String, Object> getDistributionStats(List<Long> communityIds) {
        log.info("获取住户分布统计，社区ID：{}", communityIds);
        
        try {
            Map<String, Object> stats = new HashMap<>();
            
            // 分布统计
            Map<String, Long> householdTypeDistribution = new HashMap<>();
            Map<String, Long> householdStatusDistribution = new HashMap<>();
            Map<String, Long> areaDistribution = new HashMap<>();
            Map<String, Long> floorDistribution = new HashMap<>();
            Map<Long, Object> communityDistribution = new HashMap<>();
            
            // 住户类型分布
            householdTypeDistribution.put("住宅", 0L);
            householdTypeDistribution.put("商铺", 0L);
            householdTypeDistribution.put("办公", 0L);
            householdTypeDistribution.put("其他", 0L);
            
            // 住户状态分布
            householdStatusDistribution.put("空闲", 0L);
            householdStatusDistribution.put("已售", 0L);
            householdStatusDistribution.put("已租", 0L);
            householdStatusDistribution.put("装修中", 0L);
            householdStatusDistribution.put("自住", 0L);
            
            // 面积分布
            areaDistribution.put("小户型(<60㎡)", 0L);
            areaDistribution.put("中户型(60-120㎡)", 0L);
            areaDistribution.put("大户型(120-200㎡)", 0L);
            areaDistribution.put("超大户型(>200㎡)", 0L);
            
            // 楼层分布
            floorDistribution.put("低层(1-6层)", 0L);
            floorDistribution.put("中层(7-12层)", 0L);
            floorDistribution.put("高层(13-20层)", 0L);
            floorDistribution.put("超高层(>20层)", 0L);
            
            // 按社区分布
            for (Long communityId : communityIds) {
                Long householdCount = householdService.countHouseholds(communityId);
                
                Map<String, Object> communityData = new HashMap<>();
                communityData.put("totalHouseholds", householdCount);
                communityData.put("householdTypeDistribution", new HashMap<>(householdTypeDistribution));
                communityData.put("householdStatusDistribution", new HashMap<>(householdStatusDistribution));
                communityData.put("areaDistribution", new HashMap<>(areaDistribution));
                communityData.put("floorDistribution", new HashMap<>(floorDistribution));
                
                communityDistribution.put(communityId, communityData);
            }
            
            // 构建返回数据
            stats.put("householdTypeDistribution", householdTypeDistribution);
            stats.put("householdStatusDistribution", householdStatusDistribution);
            stats.put("areaDistribution", areaDistribution);
            stats.put("floorDistribution", floorDistribution);
            stats.put("communityDistribution", communityDistribution);
            
            return stats;
            
        } catch (Exception e) {
            log.error("获取住户分布统计失败", e);
            throw new RuntimeException("获取住户分布统计失败：" + e.getMessage());
        }
    }

    /**
     * 获取住户趋势分析
     */
    public Map<String, Object> getTrendAnalysis(List<Long> communityIds, Integer days) {
        log.info("获取住户趋势分析，社区ID：{}，天数：{}", communityIds, days);
        
        try {
            Map<String, Object> analysis = new HashMap<>();
            
            // 趋势数据
            Map<String, List<Object>> trends = new HashMap<>();
            Map<String, Object> trendData = new HashMap<>();
            
            // 模拟趋势数据
            trends.put("householdCountTrend", java.util.Arrays.asList());
            trends.put("occupancyRateTrend", java.util.Arrays.asList());
            trends.put("newHouseholdTrend", java.util.Arrays.asList());
            trends.put("moveOutTrend", java.util.Arrays.asList());
            
            // 趋势分析数据
            trendData.put("startDate", LocalDate.now().minusDays(days));
            trendData.put("endDate", LocalDate.now());
            trendData.put("period", days + "天");
            trendData.put("trends", trends);
            
            // 这里应该根据实际业务需求生成趋势数据
            // 暂时返回模拟数据
            
            analysis.put("trendAnalysis", trendData);
            
            return analysis;
            
        } catch (Exception e) {
            log.error("获取住户趋势分析失败", e);
            throw new RuntimeException("获取住户趋势分析失败：" + e.getMessage());
        }
    }

    // ==================== 接口定义的方法 ====================

    @Override
    public Map<Long, Integer> countHouseholdsByRegion(List<Long> regionIds) {
        log.info("按区域统计房户数量，区域ID：{}", regionIds);
        
        try {
            Map<Long, Integer> result = new HashMap<>();
            
            // 这里应该根据区域ID查询房户数量
            // 暂时返回模拟数据
            for (Long regionId : regionIds) {
                result.put(regionId, 0);
            }
            
            return result;
            
        } catch (Exception e) {
            log.error("按区域统计房户数量失败", e);
            throw new RuntimeException("按区域统计房户数量失败：" + e.getMessage());
        }
    }

    @Override
    @Cacheable(value = "household:countByCommunity", key = "#communityIds.hashCode()", unless = "#result == null || #result.isEmpty()")
    public Map<Long, Integer> countHouseholdsByCommunity(List<Long> communityIds) {
        long startTime = System.currentTimeMillis();
        log.info("按社区统计房户数量，社区ID：{}", communityIds);
        
        try {
            // 参数验证
            if (communityIds == null || communityIds.isEmpty()) {
                log.warn("社区ID列表为空，返回空统计结果");
                return new HashMap<>();
            }
            
            Map<Long, Integer> result = new HashMap<>();
            
            for (Long communityId : communityIds) {
                try {
                    Long count = householdService.countHouseholds(communityId);
                    result.put(communityId, count != null ? count.intValue() : 0);
                } catch (Exception e) {
                    log.error("统计社区{}房户数量失败", communityId, e);
                    result.put(communityId, 0); // 生产环境优雅降级
                }
            }
            
            long endTime = System.currentTimeMillis();
            log.info("按社区统计房户数量完成，社区数量：{}，耗时：{}ms", communityIds.size(), endTime - startTime);
            return result;
            
        } catch (Exception e) {
            long endTime = System.currentTimeMillis();
            log.error("按社区统计房户数量失败，耗时：{}ms", endTime - startTime, e);
            return new HashMap<>(); // 生产环境优雅降级
        }
    }

    @Override
    public Map<Long, Integer> countHouseholdsByBuilding(List<Long> buildingIds) {
        log.info("按楼栋统计房户数量，楼栋ID：{}", buildingIds);
        
        try {
            Map<Long, Integer> result = new HashMap<>();
            
            // 这里应该根据楼栋ID查询房户数量
            // 暂时返回模拟数据
            for (Long buildingId : buildingIds) {
                result.put(buildingId, 0);
            }
            
            return result;
            
        } catch (Exception e) {
            log.error("按楼栋统计房户数量失败", e);
            throw new RuntimeException("按楼栋统计房户数量失败：" + e.getMessage());
        }
    }

    @Override
    @Cacheable(value = "household:countByUnit", key = "#unitIds.hashCode()", unless = "#result == null || #result.isEmpty()")
    public Map<Long, Integer> countHouseholdsByUnit(List<Long> unitIds) {
        long startTime = System.currentTimeMillis();
        log.info("按单元统计房户数量，单元ID：{}", unitIds);
        
        try {
            // 参数验证
            if (unitIds == null || unitIds.isEmpty()) {
                log.warn("单元ID列表为空，返回空统计结果");
                return new HashMap<>();
            }
            
            Map<Long, Integer> result = new HashMap<>();
            
            for (Long unitId : unitIds) {
                try {
                    Long count = householdService.countHouseholds(unitId);
                    result.put(unitId, count != null ? count.intValue() : 0);
                } catch (Exception e) {
                    log.error("统计单元{}房户数量失败", unitId, e);
                    result.put(unitId, 0); // 生产环境优雅降级
                }
            }
            
            long endTime = System.currentTimeMillis();
            log.info("按单元统计房户数量完成，单元数量：{}，耗时：{}ms", unitIds.size(), endTime - startTime);
            return result;
            
        } catch (Exception e) {
            long endTime = System.currentTimeMillis();
            log.error("按单元统计房户数量失败，耗时：{}ms", endTime - startTime, e);
            return new HashMap<>(); // 生产环境优雅降级
        }
    }

    @Override
    public List<Object> getHouseholdOccupancyTrend(Long regionId, String startDate, String endDate) {
        log.info("获取房户入住率趋势数据，区域ID：{}，开始日期：{}，结束日期：{}", regionId, startDate, endDate);
        
        try {
            // 这里应该查询历史数据，暂时返回模拟数据
            return java.util.Arrays.asList();
            
        } catch (Exception e) {
            log.error("获取房户入住率趋势数据失败", e);
            throw new RuntimeException("获取房户入住率趋势数据失败：" + e.getMessage());
        }
    }

    @Override
    public Object getHouseholdDistribution(Long regionId) {
        log.info("获取房户分布统计数据，区域ID：{}", regionId);
        
        try {
            // 这里应该查询分布统计数据，暂时返回模拟数据
            Map<String, Object> distribution = new HashMap<>();
            distribution.put("totalHouseholds", 0L);
            distribution.put("occupiedHouseholds", 0L);
            distribution.put("vacantHouseholds", 0L);
            distribution.put("occupancyRate", 0.0);
            
            return distribution;
            
        } catch (Exception e) {
            log.error("获取房户分布统计数据失败", e);
            throw new RuntimeException("获取房户分布统计数据失败：" + e.getMessage());
        }
    }

    @Override
    public String exportHouseholdStats(Long regionId, String type) {
        long startTime = System.currentTimeMillis();
        log.info("导出房户统计报表，区域ID：{}，报表类型：{}", regionId, type);
        
        try {
            // 参数验证
            if (regionId == null) {
                log.warn("区域ID为空，返回null");
                return null;
            }
            
            if (type == null || type.trim().isEmpty()) {
                log.warn("报表类型为空，返回null");
                return null;
            }
            
            // 这里应该生成报表文件，暂时返回模拟数据
            String result = "/exports/household_stats_" + regionId + "_" + type + ".xlsx";
            
            long endTime = System.currentTimeMillis();
            log.info("导出房户统计报表完成，区域ID：{}，报表类型：{}，耗时：{}ms", regionId, type, endTime - startTime);
            return result;
            
        } catch (Exception e) {
            long endTime = System.currentTimeMillis();
            log.error("导出房户统计报表失败，区域ID：{}，报表类型：{}，耗时：{}ms", regionId, type, endTime - startTime, e);
            return null; // 生产环境优雅降级
        }
    }
} 